Bug description:

Player can suggest and then demand alliance as soon as AI opponent is discovered.

AI agrees with the demand on the absolute majorities of cases, except for prideful AI.

 Attachment:

Just a screen from my recent game, where I got alliances with all players in a rapid secession on the Pangaea map, as singing with one opens vision on the next one and so on. Basically,  I got vision on everybody at about turn 40th and allies with everybody. Humankind difficulty and slow pace. 

Steps to reproduce

- encounter AI opponent
- suggest alliance
- if declined, make a demand over diplomatic grievance
- profit!!!

 
Expected behavior

Alliance is a very beneficial thing, and it is definitely should be harder to obtain.

I expect it to be hard-earned thought prolonged cooperation with like-minded nations.